Mestinon Timespan is a cholinesterase inhibitor indicated for the treatment of myasthenia gravis. It works by inhibiting the destruction of acetylcholine by cholinesterase and thereby permitting freer transmission of nerve impulses across the neuromuscular junction. Pyridostigmine, an analog of neostigmine, is characterized by a longer duration of action and fewer gastrointestinal side effects.

Pyridostigmine Bromide Extended-Release Tablets are available in a 180mg strength.